[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 March 24 issued 2330 UT on 21 Mar 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 MARCH 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 MARCH) 
Date   T index  Conditions    
21 Mar   138    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M2.0 20/2255UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Feb      138
Mar      111
Apr      112


2. FORECAST (22 MARCH - 24 MARCH)
Date   T index  Conditions       MUFs                              
22 Mar   125    Normal-fair      Near predicted monthly values
23 Mar   135    Normal           Near to 15% above predicted 
                                 monthly values    
24 Mar   135    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 28 was issued on 
20 March and is current for 20-22 Mar. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 21-Mar were enhanced 
for the majority of the UT day, with the strongest enhancements 
observed in the northern Australian region during local night. 
Brief depressions of up to 10% were observed during local dawn 
in the southern Australian region due to recent and ongoing geomagnetic 
activity. MUFs are expected to be near predicted monthly values 
on 22-Mar. MUFs are expected to be near predicted monthly values 
to 15% enhanced over 23-24 Mar. Shortwave fadeouts are probable.

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For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au